snippet for multicolumn in quarto markdown

I am trying to put a multi-column template in a code snippet for markdown use. I have never used code snippets before, at all, and I can't seem to figure this out. I wrote the snippet in what seems to be correct but Shift-Tab doesn't work to insert it. I can get other snippets to work but I cannot figure this one out. Here is what I am working with. I realize the cursor is on the next line but shift-tab from the end of that line doesn't do anything either. I also tried it without the ! but that didn't help.

I figured it out. It needed at least one argument.